| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 12 years | 201 |
5.8%
|
| 2 | 12 years old | 391 |
11.2%
|
| 3 | 13 years old | 671 |
19.2%
|
| 4 | 14 years old | 718 |
20.6%
|
| 5 | 15 years old | 679 |
19.4%
|
| 6 | 16 years old | 509 |
14.6%
|
| 7 | More than 16 years | 324 |
9.3%
|
| Sysmiss | 55 |